Popmail access - one mail program cutting off another...

Are there any options for cppop/popmail access so that we can set it to block off any connections until the current one is finished? Many of our users are starting to use programs such as MailWasher and what not to check mail and it continues to run while the mail is being downloaded. If anything attempts to check mail why they're downloading what's there they get cut off and it tends to frustrate them.

Since I can't seem to find any info or option files for cppop I was hoping someone knew of a way to change this or if I'm going to have to send in a feature request?